Flora of North America species comparison

biennial, erect-arching, sparsely to densely hairy, sparsely to abundantly stipitate-glandular, glands usually flattened to cupulate, not pruinose;

prickles sparse to dense, erect or slightly retrorse, stout, 4–10 mm, broad-based.

usually creeping, ± woody basally, sparsely to densely hairy, eglandular, not pruinose;

prickles absent or sparse, erect, weak, 1–3 mm, narrow-based.

deciduous, palmately compound, not lustrous;

stipules filiform to narrowly lanceolate, (2–)5–15(–20) mm;

leaflets (3–)5(–7), terminal ovate to lanceolate, 7–16 × 4–9 cm, base rounded to shallowly cordate, unlobed, margins finely to coarsely serrate or doubly serrate, apex acuminate to long-attenuate, abaxial surfaces with hooked prickles on midveins, moderately hairy, moderately to densely stipitate-glandular on veins.

deciduous, ternate;

stipules free from petioles, lanceolate to ovate or elliptic, 6–11 mm;

petiole 2–11 cm;

petiolule of terminal leaflet 8–20 mm;

lateral leaflet sessile or subsessile;

terminal leaflets ovate to elliptic, 4–8 × 3–7 cm, base tapered, unlobed, lateral leaflets sometimes shallowly lobed, margins coarsely doubly serrate, apex acute, abaxial surfaces unarmed, sparsely hairy, eglandular.

terminal on short shoots, sometimes appearing axillary, (5–)15–25-flowered, racemiform, often elongate.

axillary, 1–6-flowered, cymiform or umbelliform.

unarmed or prickles sparse, hooked, densely hairy, densely short- to long-stipitate-glandular.

unarmed or prickles weak, erect, hairy, eglandular or sparsely stipitate-glandular.

bisexual;

petals white, obovate to elliptic, rarely suborbiculate, 8–20 mm;

filaments filiform;

ovaries glabrous or glabrate.

bisexual;

petals greenish white, narrowly obovate, 5.5–7 mm;

filaments laminar;

ovaries glabrous.

black, globose to cylindric, 1–2 cm;

drupelets 20–100, strongly coherent, separating with torus attached.

red, globose, 0.5–1.5 cm;

drupelets 1–10, not or weakly coherent, separating with torus attached.

= 14, 21, 28.

= 28.